B pipe alignment issue

[yamahaulass]

Running a mod chamber and h20 designs water box in my 07. It seems that the inlet on the box is too high causing problems at head pipe/chamber joint. It's gapping on the bottom because the stinger side is raised. Just curious if anyone has dealt with this issue with h20 water box. I ran 2 tanks through her before the coupler slipped causing exhaust leak.

 

[Mike W]

When I assembled my '08 this past winter I couldn't figure out why the waterbox wasn't lining up with the the b pipe to waterbox hose. I had the waterbox upside down so make sure yours is installed correctly. Do you have a picture?

 

[yamahaulass]

On a stock box I could see orientation being confused but the h20 designs there's no way to get it mixed up. Might just have to try another box or a coupler longer on the bottom to bridge the gap but it shouldn't be that way

 

[yamahaulass]

This is what I'm dealing with.with the chamber in its correct position the water box inlet is 2 inches too high

 

[Mike W]

Not sure what's going on there. I would get an OEM box and be done with it.

 

[yamahaulass]

That's the plan

 

[Mike W]

That's the plan

are you sure that box is for a RN and not some other ski?

 

[yamahaulass]

are you sure that box is for a RN and not some other ski?

I was under the impression there was only one h20 designs flowbox but after looking at random pictures there's clearly a version with the inlet turned up and one with it turned down. Maybe @Fast Elements can shed some light on it

 

[Fast Elements]

@yamahaulass what hull are you running? The only issue this would come from if the ski has alot of rocker in the front to push the box up high.

 

[yamahaulass]

@yamahaulass what hull are you running? The only issue this would come from if the ski has alot of rocker in the front to push the box up high.

07 superjet no rocker only reinforcment. Why the different inlet directions?

 

[Ducky]

I had the H2O box in my RN SJ and it fit just right...can you post a better picture so we can see the whole engine bay?

 

[yamahaulass]

Will do sometime in the next 2 hours. For now take a look at these

 

[Ducky]

I see two waterboxes that look very similar...one is laying down on its back and one it standing in normal position.

 

[yamahaulass]

I see two waterboxes that look very similar...one is laying down on its back and one it standing in normal position.

Yea sorry hard to tell with the one laying down. Basically mine is identical to the silver one except the inlet points slightly up. It ends up being 2 inches too high

 

[Fast Elements]

There is on inlet direct difference, they are all the same. The picture just shows a different angle. Are you sure your aligned correctly coming out of the headpipe to the chamber?

 

[yamahaulass]

As far back as I can get with the motor in. I even measured a friend's chamber.. From stinger to top of engine compartment (by hood seal) 6 3/8.

 

[yamahaulass]

 

[Ducky]

Maybe you could put some sort of wedge under the box to tilt it forward a little. Custom parts have custom problems!

 

[yamahaulass]

Heard that. The front of it really needs to drop 2 inches. If I can't get it sorted out I guess a longer coupler at the head pipe may hold to get through the holiday weekend. Those boats ain't gonna chase themselves

 

[SXIPro]

Rotating that B Pipe won't get you any closer?